system/linux
system/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux synced 2024-09-20 11:07:02 +00:00
Code Issues Packages Projects Releases Wiki Activity

remoteproc: stm32: Parse syscon that will manage M4 synchronisation

Browse source 
Get from the DT the syncon to probe the state of the remote processor
and the location of the resource table.

Mainly based on the work published by Arnaud Pouliquen [1].

[1]. https://patchwork.kernel.org/project/linux-remoteproc/list/?series=239877

Acked-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Loic Pallardy <loic.pallardy@st.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20200714200445.1427257-6-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Mathieu Poirier 2020-07-14 14:04:39 -06:00 committed by Bjorn Andersson
parent 95e32f868a
commit 9276536f45
1 changed files with 26 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

26
drivers/remoteproc/stm32_rproc.c
View file

@ -71,6 +71,8 @@ struct stm32_rproc {
struct reset_control *rst; struct reset_control *rst;
struct stm32_syscon hold_boot; struct stm32_syscon hold_boot;
struct stm32_syscon pdds; struct stm32_syscon pdds;
struct stm32_syscon m4_state;
struct stm32_syscon rsctbl;
int wdg_irq; int wdg_irq;
u32 nb_rmems; u32 nb_rmems;
struct stm32_rproc_mem *rmems; struct stm32_rproc_mem *rmems;
@ -607,6 +609,30 @@ static int stm32_rproc_parse_dt(struct platform_device *pdev,
*auto_boot = of_property_read_bool(np, "st,auto-boot"); *auto_boot = of_property_read_bool(np, "st,auto-boot");
/*
* See if we can check the M4 status, i.e if it was started
* from the boot loader or not.
*/
err = stm32_rproc_get_syscon(np, "st,syscfg-m4-state",
&ddata->m4_state);
if (err) {
/* remember this */
ddata->m4_state.map = NULL;
/* no coprocessor state syscon (optional) */
dev_warn(dev, "m4 state not supported\n");
/* no need to go further */
return 0;
}
/* See if we can get the resource table */
err = stm32_rproc_get_syscon(np, "st,syscfg-rsc-tbl",
&ddata->rsctbl);
if (err) {
/* no rsc table syscon (optional) */
dev_warn(dev, "rsc tbl syscon not supported\n");
}
return 0; return 0;
} }